On Thu, 19 Feb 2009, John Fox wrote:
Dear John and Brian,
My point about colour-blindness was partly tongue-in-cheek, but I think that
it's a bad choice to have the second and third colours in the default
palette as red and green.
Looking at the standard palette with dichromat::dichromat() it seems that it
depends on which flavour of red-green anomaly you have. For deuteranopia the
red and green are quite close. For protanopia they are pretty distinct and the
confusion is between colours 3 and 7 (yellow vs green) and between 4 and 6
(blue and magenta).
I agree that the standard palette isn't ideal, though.
-thomas
Thomas Lumley Assoc. Professor, Biostatistics
tlum...@u.washington.edu University of Washington, Seattle
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